To write in army time, think of it like this: Everything is the exact same as reglar time up until noon. You still put the minutes last, and after 12:59 PM, instead of it being 1, it's 13:00. To say army time verbally, you'd say Thriteen-Oh-Hundred. So 5 PM is 17:00, 2:03 PM is 14:03. Easy stuff!
Out of the choices given, the action that is more appropriate for dealing with major frustrations than with minor frustrations is gaining control of your life. The correct answer is B.